CN106570978B - The device and method that a kind of pair of Security element is detected - Google Patents
The device and method that a kind of pair of Security element is detected Download PDFInfo
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- CN106570978B CN106570978B CN201610977451.XA CN201610977451A CN106570978B CN 106570978 B CN106570978 B CN 106570978B CN 201610977451 A CN201610977451 A CN 201610977451A CN 106570978 B CN106570978 B CN 106570978B
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- security element
- magnetic
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
Abstract
The present invention relates to anti-counterfeit fields, disclose the device and method that a kind of pair of Security element is detected.It is the magnetic regions of vertical direction that the Security element, which has easy axis, and the device detected to Security element includes magnetic sensor and magnetization unit, magnetization unit includes perpendicular magnetization unit and/or horizontal magnetization unit, in which: perpendicular magnetization unit is used to make the magnetic moment direction vertical direction of all magnetic regions in Security element；Horizontal magnetization unit is used to that the magnetic moment direction of all magnetic regions in Security element to be made to become horizontal direction；And the magnetic sensor, for being detected respectively to the Security element after the magnetization of perpendicular magnetization unit and the Security element after the magnetization of horizontal magnetization unit.The present invention can successively be such that all magnetic regions in Security element become both vertically and horizontally, and be detected by the significantly different difference to realize magnetic regions of the easy axis for vertical direction of the magnetic regions waveform of variation front and back.
Description
Technical field
The present invention relates to anti-counterfeit fields, and in particular, to the device and method that a kind of pair of Security element is detected.
Background technique
With the raising of marketable securities anti-counterfeiting performance, start to improve the anti-of safety line using various technologies on marketable securities
Pseudo- ability, for example vertical orientation magnetic code technology is used to improve the anti-counterfeit capability of Security element.In this regard, mentioning in the prior art
Going out a kind of scheme for detecting above-mentioned vertical orientation magnetic code, the program can be realized the detection of vertical orientation magnetic code,
Its main innovative point is through all magnetic regions of perpendicular magnetization unit saturated magnetization, so that all magnetic regions
Magnetic moment direction is vertical direction, and the easy magnetizing axis side in the Security element is then made using the horizontal magnetization unit of particular size
Become horizontal direction to the magnetic moment direction of the magnetic regions for non-vertical direction, and easy magnetizing axis is the magnetic regions of vertical direction
Magnetic moment keeps vertical direction.The strength values of horizontal magnetization unit must be with the magnetic material coercive in magnetic regions in the program
Force parameter strictly matches, i.e., the magnetic field strength of horizontal magnetization unit is less than the magnetic regions that easy axis is vertical direction
Coercivity value but be greater than easy axis be non-vertical direction magnetic regions coercivity value.Therefore, it selects different
Coercivity magnetic material then needs to set corresponding horizontal magnetization unit magnetic field strength, so that the versatility of detection device is by tight
The limitation of lattice.
In addition, marketable securities are all by dynamic detection and identification in financial machine and tool practical application.It is with paper money counter
Example, bank note are sent to cash dispensing port from note input mouth by paper money counter transmission device.In transmit process, bank note and paper money counter sensor shape
At relative displacement, sensor slips over the detection and identification for completing machine-readable signal from bank note specific position.In order to guarantee to greatest extent
The passability of new and old bank note (especially fold bank note), the conveyor layout of financial machine and tool is often more loose, this is resulted in
The spacing of bank note and sensor, which constantly changes, in turn results in the bad status of extreme signal repeatability.Since above-mentioned detection is vertically fixed
The horizontal magnetization unit magnetic field strength of scheme requirement of magnetropism coding is strictly matched with magnetic material coercivity numerical value, this and finance
The loose design of equipment transmission device mutually conflicts, therefore in practical applications, the program may greatly reduce financial machine and tool
Recognition accuracy.
Summary of the invention
The object of the present invention is to provide the device and method that a kind of pair of Security element is detected, for solving the prior art
The intensity of middle magnetizing field must match with the magnetic material of selection and caused by detection device versatility and accuracy by
To the technical issues of certain limitation.
To achieve the goals above, the present invention provides the device that a kind of pair of Security element is detected, Security element tool
Having easy axis is the magnetic regions of vertical direction, and the device includes magnetic sensor and magnetization unit, the magnetization
Unit includes perpendicular magnetization unit and/or horizontal magnetization unit, in which: the perpendicular magnetization unit is for making the Security element
In all magnetic regions magnetic moment direction be vertical direction；The horizontal magnetization unit is used to make the institute in the Security element
The magnetic moment direction in region of being magnetic becomes horizontal direction；And the magnetic sensor, for respectively to through the perpendicular magnetization
The Security element after unit magnetization and the Security element after the horizontal magnetization unit magnetization are detected.
Optionally, the magnetic sensor is induction type magnetic sensor and/or magnetoresistive sensor.
Optionally, the magnetoresistive sensor is anisotropic magnetoresistive sensor and/or tunnel magneto-resistive sensor.
Optionally, the perpendicular magnetization unit is made of single magnet or heteropolar two opposite magnets.
Optionally, the horizontal magnetization unit be made of two opposite magnets of homopolarity or using single magnet pole to
On formed.
Optionally, the magnetic sensor is the magnetic sensor that magnetic susceptibility direction is horizontal direction or vertical direction.
Optionally, the magnetic sensor includes: the first magnetic sensor, for magnetizing to through the perpendicular magnetization unit
The Security element afterwards is detected；And second magnetic sensor, for the institute after the horizontal magnetization unit magnetization
Security element is stated to be detected.
The present invention also provides a kind of method detected using above-mentioned device to Security element, Security element tools
Having easy axis is the magnetic regions of vertical direction, and this method comprises: is made first with the perpendicular magnetization unit described
The magnetic moment direction of all magnetic regions in Security element is vertical direction；The horizontal magnetization unit is recycled to make described anti-fake
The magnetic moment direction of all magnetic regions in element becomes horizontal direction；And utilize the magnetic sensor respectively described in warp
The Security element after the magnetization of perpendicular magnetization unit and the Security element after the horizontal magnetization unit magnetization carry out
Detection.
The present invention also provides a kind of method detected using above-mentioned device to Security element, Security element tools
Having easy axis is the magnetic regions of vertical direction, and this method comprises: is made first with the horizontal magnetization unit described
The magnetic moment direction of all magnetic regions in Security element is horizontal direction；The perpendicular magnetization unit is recycled to make described anti-fake
The magnetic moment direction of all magnetic regions in element becomes vertical direction；And utilize the magnetic sensor respectively described in warp
The Security element after horizontal magnetization unit magnetization and the Security element after perpendicular magnetization unit magnetization carry out
Detection.
Through the above technical solutions, the beneficial effects of the present invention are: device for detecting Security element of the invention and
It is (or vertical that method can successively make in Security element all magnetic regions become vertical direction (or horizontal direction) and horizontal direction
Direction), and the significantly different vertical magnetism to accurately identify Security element of two kinds of magnetic regions waveforms by variation front and back
Region and horizontal magnetic region, and then can be realized the difference detection for the magnetic regions that easy axis is vertical direction, and
Magnetization unit magnetic field strength and the matching of magnetic material coercivity numerical value are more flexible compared with the existing technology, to be conducive to
Improve the versatility and accuracy of Security element detection.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the device detected in the embodiment of the present invention to Security element；
Fig. 2 is the structural schematic diagram of schematical magnetization unit；
Fig. 3 is the structural schematic diagram of another schematical magnetization unit；
Fig. 4 is that the device detected in the embodiment of the present invention to Security element is illustrated relative to the layout of Security element
Figure；
Fig. 5 is the flow diagram of the method detected in another embodiment of the present invention to Security element；
Fig. 6 a is a kind of schematical Security element sectional view；
Fig. 6 b and Fig. 6 c are to be carried out with perpendicular magnetization unit and horizontal magnetization unit to Security element shown in Fig. 6 a respectively
Sectional view after magnetization；
Fig. 7 a- Figure 10 b is obtained waveform diagram after being detected to Security element shown in Fig. 6 a respectively；
Figure 11 is the flow diagram of the method detected in another embodiment of invention to Security element.
Description of symbols
1 magnetization unit, 2 magnetic sensor
The horizontal magnetization unit of 11 perpendicular magnetization unit 12
21 first magnetic sensor, 22 second magnetic sensor
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
" first " and " second " being previously mentioned in an embodiment of the present invention is used for description purposes only, and should not be understood as referring to
Show or imply relative importance or implicitly indicates the quantity of indicated technical characteristic.
In order to improve the anti-counterfeit capability of Security element, will include easy axis in usual Security element is vertical direction
Magnetic regions (in the accompanying drawings, being indicated with symbol V), also can also include easy axis be non-vertical direction (for example, easily
Magnetize axis direction be horizontal direction, easy axis is omnidirectional etc.) magnetic regions (in the accompanying drawings, being indicated with symbol P).
The present invention is that there is provided for such Security element including at least the magnetic regions that easy axis is vertical direction
Detection device and detection method.
Embodiment one
As shown in Figure 1, the present embodiment proposes the device that a kind of pair of Security element is detected, which includes that magnetization is single
Member 1 and magnetic sensor 2, and the magnetization unit 1 includes perpendicular magnetization unit 11 and horizontal magnetization unit 12, in which: it is described
Perpendicular magnetization unit 11 is used to make the magnetic moment direction vertical direction of all magnetic regions in the Security element；The level
Magnetization unit 12 is used to that the magnetic moment direction of all magnetic regions in the Security element to be made to become horizontal direction；And the magnetic
Property sensor 2, for single to the Security element after perpendicular magnetization unit magnetization and through the horizontal magnetization respectively
The Security element after member magnetization is detected.
In the present embodiment, the magnetic field strength of perpendicular magnetization unit 11 and horizontal magnetization unit 12 is according to magnetic in Security element
The coercivity value in region is selected, and generally, it is maximum that the magnetic field strength of magnetization unit 1 is greater than magnetic material in Security element
Coercivity value, preferably twice or more of coercivity value.More specifically requirement is: being magnetized using perpendicular magnetization unit 11
When the magnetic moment direction of all magnetic regions in Security element can be made all to be vertical direction, use horizontal magnetization unit 12 carry out
The magnetic moment direction that can make all magnetic regions in Security element when magnetization is all horizontal direction.
The magnetic field strength of usual magnetization unit 12 horizontal in the design is identical as the magnetic field strength of perpendicular magnetization unit 11, but
It can also slightly distinguish.When the magnetic field strength of horizontal magnetization unit 12 and perpendicular magnetization unit 11 is slightly different, it is necessary to assure
The magnetization unit can horizontally or vertically magnetize all magnetic regions.
As shown in Figures 2 and 3, vertical based on x-z coordinate (x-axis is horizontal direction, and z-axis is vertical direction) the present embodiment
Magnetization unit 11 can be realized by single magnet (with reference to Fig. 2), can also be made of heteropolar two opposite magnets (with reference to figure
3).Accordingly, horizontal magnetization unit 12 then can use single magnet pole on to be formed (with reference to Fig. 2), can also be by homopolarity
Two opposite magnets constitute and (refer to Fig. 3).It will be appreciated by those skilled in the art that Fig. 2 and Fig. 3 are not constituted to of the invention
Limitation, and the pole N and the pole S of magnet can be interchanged in figure.
Fig. 4 shows the schematic layout pattern of the device relative to Security element of the present embodiment, and wherein magnetic regions include V magnetic
Property region and P magnetic regions.As shown in figure 4, the magnetic sensor 2 in the present embodiment preferably comprises: the first magnetic sensor
21, for being detected to the Security element after the perpendicular magnetization unit 11 magnetization；And second magnetic sensor
22, it is detected for the Security element after the horizontal magnetization unit 12 magnetizes.Wherein, perpendicular magnetization unit 11,
Horizontal magnetization unit 12 and its corresponding first magnetic sensor 21 and the second magnetic sensor 22 are based on x-z reference axis
Position distribution is substantially as shown in Figure 4.
Preferably, the magnetic sensor 2 of the present embodiment can be induction type magnetic sensor and/or magnetoresistive sensor, and
The magnetoresistive sensor can be anisotropic magnetoresistive sensor and/or tunnel magneto-resistive sensor.Moreover, magnetic sensor 2 can
Think the magnetic sensor that magnetic susceptibility direction is horizontal direction or the magnetic sensor that magnetic susceptibility direction is vertical direction, magnetosensitive
It is different to feel direction, the signal detected also can be different, will hereinafter be combined the device of the present embodiment to Security element into
The method of row detection is described in detail.
Embodiment two
Based on invention thinking identical with the device of embodiment one detected to Security element, which is provided
A kind of method that Security element is detected using the device, as shown in figure 5, this method comprises:
Step S51 makes the magnetic moment direction of all magnetic regions in the Security element hang down using perpendicular magnetization unit
Histogram to.
As shown in Figure 6 a, using Security element tool there are two easy axis as the magnetic regions of vertical direction and one easily
For magnetizing the magnetic regions that axis direction is non-vertical direction, easy axis shown in figure is the magnetism of non-vertical direction
The easy axis in region (region i.e. marked as P) is horizontally oriented, but the diagram is not constituted to limit of the invention
System, easy axis are that the easy axis of the magnetic regions of non-vertical direction can also be No yield point or other fixed
To.After step S51, the schematic diagram for being vertically magnetized the Security element after unit 11 magnetizes is as shown in Figure 6 b.It should be noted that
Above-mentioned magnetic regions are set in this example to print using same size, same magnetic material.
Step S52 is undertaken in step S51, using magnetic sensor to through the perpendicular magnetization unit magnetization after described in
Security element is detected.
Step S53 is undertaken in step S52, and all magnetic regions in the Security element are made using horizontal magnetization unit
Magnetic moment direction become horizontal direction.
Wherein, still for the Security element shown in Fig. 6 a, all magnetic regions involved in step S53 include V magnetism
Region and P magnetic regions make its magnetic moment direction become horizontal direction by horizontal magnetization unit 12, finally formed anti-fake
The schematic diagram of element is as fig. 6 c.
Step S54 examines the Security element after the horizontal magnetization unit magnetization using magnetic sensor
It surveys.
Use is worked as in the case where magnetization unit 1 is Fig. 2 or situation shown in Fig. 3 for the magnetic sensor that step S52 is related to
Magnetic susceptibility direction is the magnetic sensor of vertical direction when being detected, and the corresponding sensor signal of all magnetic regions is half
Wave signal, and V magnetic regions signal amplitude is greater than P magnetic regions, as shown in Fig. 7 a schematic diagram.Similarly, step S54 is related to
Magnetic sensor, when using magnetic susceptibility direction to be detected for the magnetic sensor of vertical direction, all magnetic regions pair
The sensor signal answered is all-view signal, and V magnetic regions signal amplitude is less than P magnetic regions, as shown in Figure 8 b.Meanwhile
Comparison diagram 7a and 7b can see, the signal amplitude detected after V magnetic regions perpendicular magnetization and horizontal magnetization regional signal
Amplitude compares the signal amplitude for becoming larger, and detecting after P magnetic regions perpendicular magnetization and horizontal magnetization regional signal width
Value, which is compared, to become smaller.Therefore, both magnetic regions can be accurately identified using features described above.
In addition, when exchanging the pole N, the pole S in Fig. 2, magnetization unit shown in Fig. 32, obtained detection waveform and figure
7a and Fig. 7 b is on the contrary, for example as shown in the exemplary waveforms of Fig. 8 a and Fig. 8 b.
Further, the magnetic sensor being related to for step S52 is Fig. 2 or situation shown in Fig. 3 in magnetization unit 2
Under, when using magnetic susceptibility direction to be detected for the magnetic sensor of horizontal direction, easy axis is horizontal direction
Sensor signal corresponding to magnetic regions (P magnetic regions) is half-wave signa, but easy axis is the magnetic of vertical direction
Sensor signal corresponding to property region (V magnetic regions) is related with the width of the magnetic regions along the x-axis direction, when the magnetism
When region is greater than the valid analysing range of magnetic sensor in the x direction along the width of x-axis, obtained waveform such as Fig. 9 a institute
Show, otherwise as illustrated in fig. 9.Similarly, the magnetic sensor being related to for step S54 is Fig. 2 or shown in Fig. 3 in magnetization unit
In the case of, when using magnetic susceptibility direction to be detected for the magnetic sensor of horizontal direction, the corresponding biography of all magnetic regions
Sensor signal is all-view signal, and V magnetic regions signal amplitude is less than P magnetic regions, as shown in figure 9b.Meanwhile comparison diagram
9a and 9b can see, and the signal amplitude detected after V magnetic regions perpendicular magnetization magnetizes the regional signal amplitude phase with level
Than becoming larger, and the signal amplitude detected after P magnetic regions perpendicular magnetization is compared with level magnetizes the regional signal amplitude
Become smaller.Figure 10 a, Figure 10 b situation are similar to Fig. 9 a, Fig. 9 b, thus know can to accurately identify using features described above this two
Kind magnetic regions.
It will be apparent to a skilled person that the waveform of Fig. 7 a- Figure 10 b is only example, but do not constitute to this hair
Bright limitation, the layout of each magnetic regions is different, the variation of the pole N and the pole S placement direction can all make gained in magnetization unit
The detection waveform arrived is different.
Embodiment three
Based on invention thinking identical with the device of embodiment one detected to Security element, which is also mentioned
A kind of method detected using the device to Security element has been supplied, as shown in figure 11, this method comprises:
Step S111 makes the magnetic moment direction water of all magnetic regions in the Security element using horizontal magnetization unit
Square to.
Step S112 is undertaken in step S111, using magnetic sensor to the institute after the horizontal magnetization unit magnetization
Security element is stated to be detected.
Step S113 is undertaken in step S112, and all magnetic areas in the Security element are made using perpendicular magnetization unit
The magnetic moment direction in domain becomes vertical direction.
Step S114 examines the Security element after perpendicular magnetization unit magnetization using magnetic sensor
It surveys.
Relative to embodiment two, the present embodiment has changed the sequence that executes of the corresponding step of embodiment two, first carries out water
Square to magnetization and Security element detection, then carry out perpendicular magnetization and Security element detection, specific magnetic history and inspection
Survey method and embodiment two are same or similar, and details are not described herein.
In addition, it will be appreciated by persons skilled in the art that the sequence of method flow diagram shown in Fig. 5 and Figure 11 not structure
At limitation of the present invention, without departing from the spirit and scope of the invention, various changes and modifications can be carried out to it.
In conclusion the device and method for detecting Security element of the embodiment of the present invention can successively make Security element
In all magnetic regions become vertical direction (or horizontal direction) and horizontal direction (or vertical direction), and pass through variation front and back
The significantly different vertical magnetism region and horizontal magnetic region to accurately identify Security element of two kinds of magnetic regions waveforms, in turn
It can be realized the difference detection for the magnetic regions that easy axis is vertical direction, and compared with the existing technology, the present invention is real
It applies magnetization unit magnetic field strength and the matching of magnetic material coercivity numerical value in the scheme of example to be more flexible, to be conducive to mention
The versatility and accuracy of high Security element detection.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. the device that a kind of pair of Security element is detected, it is the magnetism of vertical direction which, which has easy axis,
Region, which is characterized in that the device includes magnetic sensor and magnetization unit, the magnetization unit include perpendicular magnetization unit and
Horizontal magnetization unit, in which:
The perpendicular magnetization unit is used to make the magnetic moment direction vertical direction of all magnetic regions in the Security element；
The horizontal magnetization unit is used to that the magnetic moment direction of all magnetic regions in the Security element to be made to become horizontal direction；
And
The magnetic sensor, for respectively to the Security element after perpendicular magnetization unit magnetization and through the water
The Security element after flat magnetization unit magnetization is detected；
Wherein, when being detected to the Security element, by successively applying the perpendicular magnetization unit and the horizontal magnetic
Change unit become the magnetic moment direction of all magnetic regions in the Security element both vertically and horizontally, or
Person is all in the Security element by successively successively making using the horizontal magnetization unit and the perpendicular magnetization unit
The magnetic moment direction of magnetic regions becomes horizontally and vertically.
2. the apparatus according to claim 1, which is characterized in that the magnetic sensor be induction type magnetic sensor and/
Or magnetoresistive sensor.
3. the apparatus of claim 2, which is characterized in that the magnetoresistive sensor is anisotropic magnetoresistive sensor
And/or tunnel magneto-resistive sensor.
4. the apparatus according to claim 1, which is characterized in that the perpendicular magnetization unit is by single magnet or heteropolar opposite
Two magnets constitute.
5. the apparatus according to claim 1, which is characterized in that the horizontal magnetization unit two magnets opposite by homopolarity
It constitutes or is formed using single magnet pole on.
6. the apparatus according to claim 1, which is characterized in that the magnetic sensor is that magnetic susceptibility direction is horizontal direction
Or the magnetic sensor of vertical direction.
7. the apparatus according to claim 1, which is characterized in that the magnetic sensor includes:
First magnetic sensor, for being detected to the Security element after perpendicular magnetization unit magnetization；And
Second magnetic sensor is detected for the Security element after the horizontal magnetization unit magnetization.
8. a kind of method that Security element is detected using device described in any one of any one of claims 1 to 77 claim,
It is the magnetic regions of vertical direction that the Security element, which has easy axis, which is characterized in that this method comprises:
Make the magnetic moment direction vertical direction of all magnetic regions in the Security element first with the perpendicular magnetization unit；
The magnetic moment direction for recycling the horizontal magnetization unit to make all magnetic regions in the Security element becomes level side
To；And
Using the magnetic sensor respectively to the Security element after perpendicular magnetization unit magnetization and through the water
The Security element after flat magnetization unit magnetization is detected.
9. a kind of method that Security element is detected using device described in any one of any one of claims 1 to 77 claim,
It is the magnetic regions of vertical direction that the Security element, which has easy axis, which is characterized in that this method comprises:
Make the magnetic moment direction horizontal direction of all magnetic regions in the Security element first with the horizontal magnetization unit；
The magnetic moment direction for recycling the perpendicular magnetization unit to make all magnetic regions in the Security element becomes Vertical Square
To；And
It is hung down respectively to the Security element after the horizontal magnetization unit magnetization and through described using the magnetic sensor
The Security element after straight magnetization unit magnetization is detected.
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| CN110108781B (en) * | 2019-05-15 | 2023-11-10 | 中钞印制技术研究院有限公司 | Mobile device, article authentication method, apparatus and system thereof, and storage medium |
| CN110738785A (en) * | 2019-09-19 | 2020-01-31 | 中钞特种防伪科技有限公司 | Detection method and device for magnetic anti-counterfeiting element |
| CN113173022B (en) * | 2021-05-24 | 2022-10-04 | 中钞印制技术研究院有限公司 | Transparent anti-counterfeiting element, manufacturing method and detection method thereof, detection equipment thereof and security article |
| CN113147215B (en) * | 2021-05-24 | 2022-11-29 | 中钞印制技术研究院有限公司 | Transparent anti-counterfeiting element, manufacturing method and detection method thereof, detection equipment thereof and security article |
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Address after: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Patentee after: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Patentee before: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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